When you deleted your LW prefs folder, you needed to reset & make your downld location the same as before. If not, then that's why they didn't load.

It's hard to say what the cause & answer is. It could be your isp that has a program filter that kicks in when it detects you downlding at high speeds, or it could be a modem/router problem not handling the data competently (a firmware update usually fixes issues like that) or ... not sure. You could always try the LW Pro beta 4.11.x which can be accessed from your personal pro downld page & at the bottom you'll see a link for betas. To find out more about changes made with the betas see http://www.limewire.com/english/cont..._history.shtml